Preventing the presentation of the "envelope" during Erap's impeachment case led to his ousting, then after years when the envelope was openned it was found that it contains NO incriminating evidence against Erap, too late na.

This Hubert Webb case, the prosecution prevented the DNA matching of the semen fluids found in the victims and that of the accused. After years, the fluid cells can no longer be analyzed, too late na.

The Mayor Antonio Sanchez case has also the same error with the Hubert Webb Case. Hindi pinayagan na i-match ang DNA ng fluids.